Royal Crimson Dragons are so named due to their massive size and confident, regal bearing. Most of the time they are laid back, ignoring non-prey creatures smaller than themselves, although they will occasionally take fresh kills from other dragons as a reminder of their place in the social order. Although there are few other dragons large enough to pose a threat to Royal Crimsons, they have little tolerance for potential rivals and will fiercely defend their territory from such intruders.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Hai kingu is on the top of the pecking order when it comes to first pick of cave and food. He thinks of himself as king of his territory, which he basically is. The only one that can sway him is his mate Roiyaru. He may be the king, but she gets the last say in most of what he does. He listens to his mate's word and usually does as she wishes though he does get his own say in things as well. If he truly feels strongly about something, Roiyaru will back down.

His name means 'High King'.